Realizing a comprehensive approach to evidence-based practice in psychology requires the collaboration of academic researchers and practicing clinicians. Increased collaboration is likely to contribute to the growing trend of multi-investigator projects, multiple-authored publications, and the subsequent conflicts regarding authorship credit and order. Recommendations and guidance on determining authorship credit and order are available in the literature; however, few concrete tools are available to assist in determining authorship credit and order. A model policy on authorship is presented. The model policy was derived from recommendations published in the literature, in ethical standards, and in the editorial policies of both psychological and the biomedical fields. The model policy can be adopted by academic and clinical organizations, and is a useful tool for preventing authorship conflicts and encouraging collaboration in clinical research.